XML Parser (SOAP Request)

Ruby
1

First of all, sorry for my English.

Hello, I’ve been working on a new MSNP (Version 13) client for Ruby, the
only problem that I Have is that this version of the protocol has lots
of SOAP Requests and I’ve been trying the smart way of parsing it.

So, what i receive from the server is:

<?xml version='1.0' encoding='utf-8'?>

<soap:Envelope xmlns:soap=“http://schemas.xmlsoap.org/soap/envelope/”>
<soap:Header xmlns:soap=“http://schemas.xmlsoap.org/soap/envelope/”>

11.02.1331.0000

</soap:Header>
<soap:Body xmlns:soap=“http://schemas.xmlsoap.org/soap/envelope/”>






Allow


2
Passport
Accepted
false
2005-08-05T17:34:12.7870000-07:00

[email protected]
false
0
0



What I need to retrieve is everything inside the
tags, for example (following the xml above):

  • in MemberRole, I need what it’s of the tag → Allow

  • in Member, I need the value of the attribute xsi:type →
    PassportMember

  • in everything else, I need what it’s inside of the next tags
    → 2
    → Passport
    → Accepted
    → False
    …
    until

  • Note: everything that I receive from the server it’s not splited by
    end-lines.

Any help of parsing this?

Thanks in advance.

2

This is what I Have:

require ‘rexml/document’

include REXML

def strip_html(txt)
txt.gsub(/</?[^>]*>/, ‘’)
end

xml_path = ‘soap:Envelope/soap:Body/’
xml_path << ‘FindMembershipResponse/’
xml_path << ‘FindMembershipResult/Services/’
xml_path << ‘Service/Memberships/Membership’
doc = Document.new(File.new(‘c:/soap.xml’))
doc.elements.each(xml_path) {
|element|
xpath = element.to_s.dup
xpath.split("<(.?)>")
xpath.each {
|line|
case line
when /<MemberRole/i
puts strip_html(line)
when /<MembershipId*/i
puts strip_html(line)
when /<Type*/i
puts strip_html(line)
when /<State*/i
puts strip_html(line)
when /<PassportName*/i
puts strip_html(line)
end
}

}

But it’s very slow.

3

Problem Solved;

doc = Document.new(File.new(‘c:/soap.xml’))
xml_path = ‘soap:Envelope/soap:Body/’
xml_path << ‘FindMembershipResponse/’
xml_path << ‘FindMembershipResult/Services/’
xml_path << ‘Service/Memberships/Membership’

doc.each_element(xml_path) {

Everything inside

…

|element|
element.each_element {
#
|mr|
puts mr.get_text

}

element.each_element(‘Members/Member’) {
# Everything inside
|mm|
# Every children inside
children = mm.children
children.each {
|child|
begin
puts child.get_text
rescue
# do nothing
end
}
}

}

4

Is there a WSDL? If so, you can use SOAP4R and it will do the parsing
for you. Try the getting started guide here:
http://markthomas.org/2007/09/12/getting-started-with-soap4r/
and see if that helps.

5

Thank you for your responses, but the fact that I’m using ‘rexml’ is
because rexml comes with the ruby package. The problem is that if I
ever release my work I would need to work with gems.

6

Eder Quiñones wrote:

First of all, sorry for my English.

Hello, I’ve been working on a new MSNP (Version 13) client for Ruby, the
only problem that I Have is that this version of the protocol has lots
of SOAP Requests and I’ve been trying the smart way of parsing it.

I’d give hpricot a shot:

require ‘rubygems’
require ‘hpricot’

data = Hpricot.XML(File.read(“response.xml”))

data.search("//Membership").each do |membership|
puts “Membership Info”
puts membership.at("/MemberRole").inner_html
membership.search("/Members/Member").each do |member|
puts “==Member Info==”
puts member[‘xsi:type’]
puts member.at("/MembershipId").inner_html
puts member.at("/Type").inner_html
puts member.at("/State").inner_html
puts member.at("/Deleted").inner_html
puts member.at("/LastChanged").inner_html
puts member.at("/Changes").inner_html
puts member.at("/PassportName").inner_html
puts member.at("/IsPassportNameHidden").inner_html
puts member.at("/PassportId").inner_html
puts member.at("/CID").inner_html
puts member.at("/PassportChanges").inner_html
end
end